Two minor mentions after using the HH yesterday.
1) a plus of this SRT device, like the unicender, is that it is ready to descend immediately, in all situations. The Rope Wrench had the occasional situation (that is in most situations, it not an issue) where you need to engage the wrench before being able to descend. The situation that comes to mind is when a RW climber were to be resting mid ascent with full weight on the hitch, as the RW is in the disengaged (slack tether) position. Should an emergency arise (hornet nest), the climber will have to get weight off of some hitches in order to break it free.
2) I need to try out some different hitch cord/ rope combos to see what works best. I was still having some trouble getting the right wrap variation on the distel tied with Ice on PI. Consequently, when tailing the rope, I had too much friction for as smooth of tailing as should be possible, and the lower 'biner was getting caught up in the HH, snagged up on the gate of the oval biner. I don't know if a corner trap would be a solution to this, and how well it would work with the way the 'biner gets slipped through the HH. I've recently tried rubber dogbone corner traps, which are not very durable. I have a metal one to try, but haven't yet.